1. School of Physics University of Hyderabad Prof. C. R. Rao Road, Gachibowli Hyderabad Telangana India
2. Department of Microelectronics Techncial University of Sofia Kliment Ohridski blvd, 8 Sofia Bulgaria
3. Centre for Nanotechnology Research Vellore Institute of Technology (VIT) Vellore Tamil Nadu India
4. CASEST, School of Physics University of Hyderabad Prof. C. R. Rao Road, Gachibowli Hyderabad Telangana India